Concrete mixer



Apr. 24, 1923. 1,453,047

H. E. JOHNSON CONCRETE MIXER Filed June/l6 1922 2 Sheets-Sheet 1 INVENTOR HENRY JoH/vso/v.

ATTORNEY H. E. JOHNSON CONCRETE MIXER Filed June 16, 1922 2 Shets-Sheet 2 2 I E m4 1 /8 [7 I9 2/ 2 2o 25 ZZ 0 6 o 9 v 50 57 52 v o 7 N/ INVENTOR ATTORNEY Fatentedjtpr. 2

UNETEQ TitTFiS HENRY E. JOHNSON, OF MILWAUKIE, OREGON.

CONCRETE MIXER.

Application filed June 16, 1922.

To all whom it may concern Be it known that I, HENRY E. JOHNSON,

a citizen of the United States, residing at Milwaukie, in the county of Clackamas and 5 State of Oregon, have invented certain new and useful Improvements in Concrete Mixers, of which the following is the specification.

My invention relates to concrete mixers where sand, gravel, cement and water are all placed together in a rotating container to perform the mixing process, with mechanical means for dumping the mixture when completed.

The objects of my invention are; to construct a portable concrete mixer with the driving element mounted on the same carriage; to construct a carriage suitable to be drawn at the rear of an automobile without disassembling any part thereof; to pro vide driving means for the mixing container through the same bearing on which the container is rotated in dumping; to provide means for retaining the mixing container in 5 the cradle in which it is subject to rotate,

during the dumping process; to mount a dumping lever and foot pedal on the carriage frame which is connected to the cradle through levers providing means for dumping the mixing container; and to mount springs on the dumping mechanism which will assist the operator in dumping the container.

T attain these objects by the mechanism illustrated in the accompanying drawings, in which:

Figure l is a perspective view of the concrete mixer completely assembled, showing the frame of the carriage, the manner in which the mixing container is mounted in the cradle, and the housing in which the engine or driving element is contained. Figure 2 is an elevational view of the concrete mixer showing the mixing container from the side, and the position which it holds with respect to the other parts during the mixing process; Figure 8 is an elevational view of the concrete mixer showing the mixing container from the side, and the position which it holds with respect to the other parts during the mixing process; Figure 8 is an elevational view of the mixer in the dumping position, illustrating the position of the dumping levers during the dumping operation. Figure 4 is an eleva- Serial No. 568,677.

tional view of the container head, showing how the drive shaft is connected thereto. Figure 5 is an elevational view of the gear mechanism and bracket through which the container is driven and held in place in the cradle.

Similar numerals refer to similar parts throughout the several views.

The frame of the carriage is built of angle iron and mounted in the axle, 1, which is adapted to the wheels, 2, fitted with rubber tires of suitable type. The engine is mounted within the housing, 3, and suitably placed to provide a chain drive, through which the mixer is operated. The frame of the carriage is provided with legs, 4:, in order that the mixer can be held in a level position while in operation.

Parts 5, are mounted on the extended portions of the frame, 6, said parts being fitted with a hole or bearing, 7, the centers of which are on a common center line, with a space provided between the two parts, 5, in which the mixing container cradle is mounted. The sides of the cradle are built of angle iron, 8, and the ends thereof are fitted and fastened to the brackets as shown in Figures 1, 2 and 3 of the drawings. These brackets are fitted with extended bearings which are adapted to fit the bearings provided in the parts 5. The whole cradle is pivoted through these hearings, and as it is shown in Figure 1, the cradle falls between th parts 5 and is made free to rise without interfering with other parts of the cradle and carriage.

The bracket 9, are provided with an extension on the inside, to which, the cross piece, 10, is fastened to form a brace holding the parts in a fixed position, with re lation to each other. At the rear or bottom of the barrel, or mixing container, the cross piece, 11', is fastened to the parts, 8, holding the same together, and carrying the gear mechanism mounted thereon. It is not the intention to confine this part of the cradle, to a one piece connection, as it may be advisable to employ two or more cross pieces to fit the condition.

Two rollers, 12, are fitted to the posts 13, and mounted on the cross piece, 10, at points equally each side of the center line of the cradle. One of these rollers can be seen in Figure 1. The center line of the shaft, 14,. is in common with the center line of the mixing container, 15, and both of said center lines are in the same vertical plane as the center line of the cradle. The shaft is fastened to the closed bottom of the container, through the spider, 16, in the man ner shown in Figure 4% of the drawings. The shaft 14 is rotatively mounted in the bearing 17, with the gear 18 fastened to the end thereof. This bearing has arms extending around the gear, 18, which are fitted with openings through which the shaft, 19, passes, subject to rotate therein. A gear, 20, is fastened to the shaft, and" mounted between the arms, 21, to fall in mesh with the gear, 18, as shown in Figures 2, 3 and 5 of the drawings. Bearings, 22, are mounted on the cross piece 11, in which, the shaft, 19, is made to rotate. On the end of the shaft, 19, the sprocket 23, is fastened, the shaft extending past the side of the container far enough to allow a chain to operate over the sprocket, at right angles to the shaft on which it is mounted.

An opening is provided through the bracket 9, in the center of the bearing 7, (shown at the left in Figure 1), through which the shaft 24 passes and is subject to rotate. A sprocket 25, is fastened to the shaft, on the end next to the mixing container, said sprocket being in alignment with the sprocket 23, which is mounted on the shaft 19. A chain is placed over these sprockets to transfer the motion of one to the other;

A second sprocket 27, is fastened to the shaft 24, and aligned with a suitable sprocket mounted on the driving hub of the engine within the housing 3. The last two sprockets mentioned are connected with the chain 28 through which the power of the engine is transferred.

A band or track 29, is placed about the mixing container and fastened thereto, said track is so placed as to fall in contact with the rollers 12, on which the container is subject to rotate. From the above description, it will be understood how the operation of the mixer is performed. The material is placed in the mixing container, which is provided with paddles, the container is made to rotate and the mixingis performed while the container is in the position shown in Figures 1 and 2 of the drawing.

The dumping mechanism is constructed as follows:

The shaft 30, is mounted on the carriage at a suitable position, and has fastened thereto levers 31 which extend to the rear of the cradle where they are connected to the same through the rods, 32. The end of the shaft extends to the outside of the carriage, and has mounted thereon, the hand lever 33, which is provided with a foot pedal 34 at the lower end.

The brackets 9, are provided with an arm 35 which drops from the bearing 7, and has connected to the end thereof, the spring 86, which is held in tension by a connection provided at a suitable point on the carriage frame. This spring is drawn in tension by the outward motion of the arm 35, when the container and cradle are lowered to the position shown in Figure 2. The operation of lowering the cradle is made with the hand lever, and the cradle is retained in the lowered position by the dog, 87, engaging with the rack 38, which is mounted on the carriage frame.

It will be understood how the application of the springs 36, is applied in assisting in dumping the mixing container, while the hand and foot of the operator is applied to the lever and pedal.

Having fully described my invention, I claim and desire to protect by Letters Patent:

1. In a concrete mixer of the type de scribed, a mixer frame, a cradle pivoted at one end thereof and carrying a mixing container therein, levers and connecting rods mounted on said mixer frame and connected to the cradle, brackets mounted about said cradle pivots provided with levers falling in the down-ward direction, springs attached to said bracket levers and held in tension by a fastening on the mixer frame, such that said springs will operate in tension and assist in dumping the mixer container.

2.1n a concrete mixer of the type described, a mixer frame, a cradle pivoted at one end thereof and carrying a mixing container therein, levers and connecting rods mounted on said mixer frame and connected to the cradle, brackets mounted about said cradle pivots provided with levers falling in the down-ward direction, springs attached to said bracket levers and held in tension by a fastening on the mixer frame, such that said springs will operate in tension and assist in dumping the mixer container, the pivotal connection of the cradle being on the outer side of the frame near the front of the mixing container, substantially as described.

HENRY E. JOHNSON. 

